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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.xerces.xni;

/**
 * Location information.
 *
 * @author Andy Clark, IBM
 *
 * @version $Id: XMLLocator.java 447247 2006-09-18 05:23:52Z mrglavas $
 */
public interface XMLLocator {

    //
    // XMLLocator methods
    //
    
    /** Returns the public identifier. */
    public String getPublicId();
    
    /** Returns the literal system identifier. */
    public String getLiteralSystemId();
    
    /** Returns the base system identifier. */
    public String getBaseSystemId();
    
    /** Returns the expanded system identifier. */
    public String getExpandedSystemId();
    
    /** Returns the line number, or -1 if no line number is available. */
    public int getLineNumber();
  
    /** Returns the column number, or -1 if no column number is available. */
    public int getColumnNumber();
    
    /** Returns the character offset, or -1 if no character offset is available. */
    public int getCharacterOffset();

    /** 
     * Returns the encoding of the current entity.  
     * Note that, for a given entity, this value can only be
     * considered final once the encoding declaration has been read (or once it
     * has been determined that there is no such declaration) since, no encoding
     * having been specified on the XMLInputSource, the parser
     * will make an initial "guess" which could be in error. 
     */
    public String getEncoding();
    
    /** 
     * Returns the XML version of the current entity. This will normally be the
     * value from the XML or text declaration or defaulted by the parser. Note that
     * that this value may be different than the version of the processing rules 
     * applied to the current entity. For instance, an XML 1.1 document may refer to
     * XML 1.0 entities. In such a case the rules of XML 1.1 are applied to the entire 
     * document. Also note that, for a given entity, this value can only be considered
     * final once the XML or text declaration has been read or once it has been
     * determined that there is no such declaration.
     */
    public String getXMLVersion();


} // interface XMLLocator